Axial muscle-fibre orientations in developing larval zebrafish

A dataset 'fit_results.pkl' and accompanying Python code to extract data from the datafile. The .pkl file contains the raw and helical model fit data of muscle fibres of larval zebrafish, aged 2-13 days post-fertilization (dpf). The datafile's structure is explained in detail with example uses in the Python script 'Data_extraction_pkl_file.py' .

These data belong to the paper:Noraly M. M. E. van Meer, Johan L. van Leeuwen, Martin J. Lankheet (2025b) Axial muscle-fibre orientations in developing larval zebrafish. J Exp Biol 2025; jeb.250905. doi: https://doi.org/10.1242/jeb.250905

Additionally, the data of the 4 days post-fertilization larvae in this file were used in:Noraly M.M.E. van Meer, Johan L. van Leeuwen, Henk Schipper, Martin J Lankheet (2025a) Axial muscle-fibre orientations in larval zebrafish. Journal of Anatomy, 246, 517–533. Available from: https://doi.org/10.1111/joa.14161.

A detailed description of the collection of the muscle-fibre orientation measurements in larval zebrafish of 4 dpf can be found in Van Meer et al. (2025a) J Anat, whereas the model fit and information on the individuals of all ages 2-13 dpf is described in detail in Van Meer et al. (2025b) JEB.